Across
High-altitude bases offering exceptional aspect from Alps (5,9)
Chap stopping fool in afternoon meal getting some water (6,3)
I haven't cracked this one yet — but Fifteensquared have:
[ MAN(chap/a fellow) contained in ( stopping ) ASS(a fool/donkey) ] contained in ( in ) TEA(afternoon meal).
Bird regrettably chokes (5)
English easy about rubbish (5)
I haven't cracked this one yet — but Fifteensquared have:
Reversal of ( … about ) [ E(abbrev. for “English”) + GLIB(describing the words or a speaker who is fluent and implying that something is easy, when it is not) ].
Bitterness shown by Turkey abandoning Mediterranean port in campaign (9)
I haven't cracked this one yet — but Fifteensquared have:
GALL(bitterness/resentment) plus ( shown by ) [ “TR”(International Standardised Code for the country, Turkey) deleted from ( abandoning ) “Tripoli”(Mediterranean port in Lebanon or Libya, take your pick) ].
Ruin, perhaps as a march crushes Left (8)
I haven't cracked this one yet — but Fifteensquared have:
DEMO-ISH(in the manner of “devil/devilish”, as/like a protest march/demonstration) containing ( crushes ) L(abbrev. for “left”).
Border gradually moving (6)
Idyllic spot in Sudan axed following setback (6)
Moderate team primarily needing a goal to equalise? (4,4)
I haven't cracked this one yet — but Fifteensquared have:
1st letter of ( … primarily ) “ team ” + [ONE DOWN](in a, say, football match, losing by a goal and therefore needing a goal to equalise the score).
For example, a toothbrush might initially get rid of persistent pain (9)
I haven't cracked this one yet — but Fifteensquared have:
1st letter of ( … initially ) “ might ” + OUST(to get rid of/to depose from a position) + ACHE(persistent pain).
Old bandmaster provided by America (5)
Large old ship that's broad and slow (5)
Turkey with plain dressing served around northern resort (9)
I haven't cracked this one yet — but Fifteensquared have:
DUD(a turkey/a failure) contained in ( with … dressing ) LLANO(a South American treeless grassy plain) containing ( served around ) N(abbrev. for “northern”).
Beneath loose pants, grip is inferior (14)
Down
European tax-based changes more than sufficient to encourage antisocial behaviour (3,1,3,7)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of ( … changes ) [ E(abbrev. for “European”) + TAX-BASED ] + AMPLE(more than sufficient/aplenty).
Son of David rating peace for Israel — that's not hard (7)
I haven't cracked this one yet — but Fifteensquared have:
AB(abbrev. for “able-bodied seaman”/a seaman or naval rating) + “shalom!”(“Peace!”, as a greeting among the Jewish people of Israel) minus ( that’s not ) “h”(abbrev. for “hard”).
Ignoring poll, shouted about celebrity with a glossy exterior (9)
I haven't cracked this one yet — but Fifteensquared have:
Its 1st letter ( … poll /the head) deleted from ( Ignoring ) “yelled”(shouted loudly) containing ( about ) NAME(a celebrity/a well-known personality).
Final flag hoisted above ship's stern, done in desperation at the eleventh hour (4-4)
I haven't cracked this one yet — but Fifteensquared have:
LAST(final/the one coming at the end) + reversal of ( … hoisted , in down clue) SAG(to flag/to weaken) placed above ( above , in a down clue) last letter of ( …’s stern ) “ ship “.
Corridor covered with it — rising fungus and lichen, say (6)
I haven't cracked this one yet — but Fifteensquared have:
HALL(a corridor/a passageway just inside the entrance of a house) contained in ( covered with ) reversal of ( … — rising , in a down clue) IT .
In seconds, forget about people slain with daggers (5)
I haven't cracked this one yet — but Fifteensquared have:
2nd letters, respectively, of ( In seconds ) “ forget about people slain with “.
Refuse working with international telecom pioneer (7)
Deceiving band in double-cross that's been planned throughout (9,5)
I haven't cracked this one yet — but Fifteensquared have:
RING(a circular band) contained in ( in ) STING(a double-cross/a deception that has been planned) + ALONG(moving in a constant direction/through/throughout?, as in “we walked along/through the passageway”, whereas “we walked all along/throughout the given route”.
Embellished by dodgy press dude (7,2)
Negative duo that won't bond on record is entering retreat (4,4)
I haven't cracked this one yet — but Fifteensquared have:
[ ON + EP(abbrev. for an “extended play record”, a musical recording with more tracks than a single) ] contained in ( is entering ) LAIR(an animal’s den/a retreat).
Heartless upstart right to cut gas for which there's no charge (7)
I haven't cracked this one yet — but Fifteensquared have:
[ All inner letters deleted from ( Heartless ) “ upstart ” + R(abbrev. for “right”) ] contained in ( to cut ) NEON(an inert gas).
Pseudo switched, heading for interdisciplinary church organisation (4,3)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of ( … switched ) PSEUDO + 1st letter of ( heading for ) “ interdisciplinary “.
Explains about constant contributors to immune response (1-5)
I haven't cracked this one yet — but Fifteensquared have:
TELLS(explains/communicates information) containing ( about ) C(in maths, the symbol for any constant/non-variable; and in physics, the symbol for the speed of light in a vacuum).
Steak essentially rubbery in quality (1-4)
I haven't cracked this one yet — but Fifteensquared have:
Middle letter of ( essentially ) “ rubbery ” contained in ( in ) TONE(the quality/the feel about something, such as a place).
Type letters or click words in the clue
